Results 171 to 180 of about 3,306 (203)

Intelligent algorithmic framework for detection and mitigation of BeiDou spoofing attacks in vehicular ad hoc networks (VANETs). [PDF]

PeerJ Comput Sci
Tariq U.
europepmc   +1 more source

Optimal design of broadcast ephemeris parameters for a navigation satellite system

GPS Solutions, 2011
Computation of broadcast ephemerides is a fundamental task in satellite navigation and positioning. The GPS constellation is composed of medium-earth-orbit (MEO) satellites, and therefore can employ a uniform parameter set to produce broadcast ephemerides.
Xiaofeng Fu, Meiping Wu
openalex   +3 more sources

Autonomous broadcast ephemeris improvement for GNSS using inter-satellite ranging measurements

Advances in Space Research, 2012
Abstract This paper discusses the concept of using inter-satellite ranging (ISR) measurements of the satellites of a Global Navigation Satellite System (GNSS) for autonomous broadcast ephemeris improvement. Firstly the inter-satellite ranging is modeled to obtain the clock and orbit error observables.
Hongliang Xu, Jinling Wang, Xingqun Zhan
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A broadcast ephemeris design of LEO navigation augmentation satellites based on the integration-type ephemeris model

Measurement Science and Technology, 2021
Abstract Low Earth orbit (LEO) satellites are a promising type of navigation augmentation satellite for current global navigation satellite systems. Aiming at the navigation function, an effective broadcast ephemeris model needs to be designed for LEO satellites.
Junping Chen, Yize Zhang, Lingdong Meng, Lingdong Meng, Jiexian Wang   +4 more
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Broadcast Ephemeris Accuracy Analysis for GPS Based on Precise Ephemeris

Applied Mechanics and Materials, 2014
The accuracy of broadcast ephemeris is an important index of a satellite navigation system. The theory and method of precise ephemeris assessing broadcast ephemeris are introduced. The accuracy of GPS satellite broadcast ephemeris is assessed with the precise ones provided by IGS.
Dong Yang Jin, Chang Feng Xia, Rui Xi Jia, Xiao Yu Li   +3 more
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Performance Evaluation of the CNAV Broadcast Ephemeris

Journal of Navigation, 2019
The new Global Positioning System (GPS) Civil Navigation Message (CNAV) has been transmitted by Block IIR-M and Block IIF satellites since April 2014, both on the L2C and L5 signals. Compared to the Legacy Navigation Message (LNAV), the CNAV message provides six additional parameters (two orbit parameters and four Inter-Signal Correction (ISC ...
Ahao Wang, Junping Chen, Yize Zhang, Jiexian Wang, Bin Wang   +4 more
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Computing satellite velocity using the broadcast ephemeris

GPS Solutions, 2004
GPS has been used for applications where satellite velocities are needed as well as satellite positions. Traditionally, the position was determined from noisy code pseudoranges while the velocity came from delta carrier phase measurements. This motivates the need to have a velocity model to accompany the velocity data.
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Type B Fault Integrity Monitoring for BDS Broadcast Ephemeris

2020
The integrity and continuity of aircraft precision approach are the most significant performance requirements for aviation users. To ensure positioning integrity of users, it is necessary to detect type B ephemeris fault one of the main integrity risk sources of precision approach.
Li Hui, Liang Li, Liu Yuanyuan, Chun Cheng   +3 more
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